[CCMC 13102-R] CCMC Canadian code compliance evaluation
From: National Research Council Canada
Pieux Vistech - Postech Screw Piles Inc.
10260 boulevard Bourque
|Code compliance:||NBC 2015, OBC|
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Code compliance opinion
It is the opinion of the Canadian Construction Materials Centre that the evaluated products, when used as an augered steel pile in a foundation system in accordance with the conditions and limitations stated in this evaluation, comply with the following code:
National Building Code of Canada 2015
|ID||Code provision||Solution type|
|04-02-03-08-01-e-00||188.8.131.52.(1)(e) CSA G40.21, "Structural Quality Steel."||Acceptable|
|04-02-03-10-00-0-00||184.108.40.206.(1) Where conditions are corrosive to steel, ...||Acceptable|
|04-02-04-01-00-0-00||220.127.116.11.(1) The design of foundations, excavations a ...||Acceptable|
|04-03-04-01-00-0-00||18.104.22.168.(1) Buildings and their structural members m ...||Acceptable|
|09-04-01-01-01-c-01||22.214.171.124.(1)(c)(i) Part 9, or||Acceptable|
Ontario Building Code
Ruling No. 04-16-120 (13102-R) authorizing the use of this product in Ontario, subject to the terms and conditions contained in the Ruling, was made by the Minister of Municipal Affairs and Housing on 2004-07-20 (revised 2012-07-27) pursuant to s.29 of the Building Code Act, 1992 (see Ruling for terms and conditions). This Ruling is subject to periodic revisions and updates.
The above opinion is based on the evaluation by the CCMC of technical evidence provided by the evaluation holder, and is bound by the stated conditions and limitations. For the benefit of the user, a summary of the technical information that forms the basis of this evaluation has been included.
- Pile P178
- Pile P238
- Pile P312
The product is an earth anchor constructed of helical-shaped circular steel blade(s) that is (are) welded to a steel shaft. The blade is constructed as a helix with a carefully controlled pitch.
The anchors come in threepile types: P178, P238, and P312. The Properties of the product pile type table indicates the properties for each pile type.
|Type||Exterior diameter of post||Wall thickness of post||Diameter of helix blade||Thickness of blade|
|Pile P178||48 mm||3.7 mm||200 mm||8 mm|
|Pile P238||60 mm||3.9 mm||200 mm||8 mm|
|355 mm||9.5 mm|
|300 mm||12.7 mm|
|Pile P312||89 mm||5.5 mm||255 mm||9.5 mm|
|405 mm||12.7 mm|
The anchor type and blade diameter are chosen based on the bearing capacity of the soil and the load the auger-installed steel pile is designed to support. The central shaft is used to transmit torque during installation and to transfer axial loads to the helical plate.
The foundation system comes with various other accessories, such as plates, to adapt to the building structure, extension shafts and connectors, which conform to CSA G40.20-13/G40.21-13, “General Requirements for Rolled or Welded Structural Quality Steel/Structural Quality Steel” All accessories with treaded rods conform to ASTM A 325-14.
The steel shaft, blades and accessories conform to the 350 MPa requirement of CSA G40.20/G40.21 or ASTM A 500/A 500M-10a, “Standard Specification for Cold-Formed Welded and Seamless Carbon Steel Structural Tubing in Rounds and Shapes.” They have a galvanic coating that meets the 610 g/m2 requirement of ASTM A 123/A 123M, “Standard Specification for Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel Products.” All welders at Pieux Vistech / Postech Screw Pile Inc. are certified in accordance with the Canadian Welding Bureau to produce welds conforming to CSA W59-13, “Welded Steel Construction (Metal Arc Welding)”.
Figure 1 shows a typical steel pile with a single helical blade.
This evaluation is valid only for products produced at the following plant:
|Product names||Manufacturing plant|
|Sherbrooke, QC, CA|
|Pile P178||Product evaluated by the CCMC|
|Pile P238||Product evaluated by the CCMC|
|Pile P312||Product evaluated by the CCMC|
Product evaluated by the CCMC Indicates that the product from this manufacturing facility has been evaluated by the CCMC
Conditions and limitations
The CCMC’s compliance opinion is bound by this product being used in accordance with the conditions and limitations set out below.
- The product under this evaluation is intended to be used as a foundation system to support the following types of construction:
- Single storey residential buildings within the scope of Part 9 of NBC 2015; and
- Accessory buildings such as sheds, gazebos, sunrooms, carports, decks or porches within the scope of Part 9 of NBC 2015.
Other applications are beyond the scope of this evaluation, and a professional engineer skilled in such design and licensed to practice under the appropriate provincial or territorial legislation must determine the pile capacity and other design parameters.
- The product may be used as part of a foundation system to support various constructions, provided that it is installed according to the manufacturer’s current instructions and within the scope of this evaluation.
- When the product is installed in granular soil or silt, there is a direct relationship between the applied torque and the allowable compressive and tensile loads. The Allowable compressive and tensile loads for the product in granular soil or silt table indicates the allowable compressive and tensile loads as a function of the applied torque.
- When the product is installed in a cohesive soil, such as clay, there is a direct relationship between the applied torque and the allowable compressive and tensile loads. The Allowable compressive and tensile loads for the product in cohesive soil table indicates the allowable compressive and tensile loads as a function of the applied torque.
- When the auger-installed steel pile is installed in a soil with granular material that exceeds 200 mm in diameter, the relationship between the applied torque and the allowable compressive and tensile loads is not as predictable. When it is installed in such soils, the allowable compressive and tensile loads have to be confirmed by on-site load tests. These load tests are also required if the allowable loads need to be greater than those stated in the above-referenced tables. The tests need to be conducted under the direct supervision of a professional geotechnical engineer, skilled in such design and licensed to practice under the appropriate provincial or territorial legislation.
- In all cases, a registered professional engineer skilled in such design and licensed to practice under the appropriate provincial or territorial legislation must determine the number and spacing of the auger-installed steel piles required to carry all the factored loads. A certificate attesting to the conformity of the installation and the allowable loads for the piles must be provided by a certified installer.
- Where conditions (soil and environmental) are determined to be corrosive to steel, protection of the steel shall be provided. The determination of the presence of corrosive conditions and the specification of the corrosion protection shall be carried out by a registered professional engineer licensed to practice under the appropriate provincial or territorial legislation. If the determination of the presence of corrosive conditions is not completed before installation, the product, including all its accessories, is required to be hot-dipped galvanized, meeting the requirements of CAN/CSA-G164 (ASTM A 123/A 123M-17) with a minimum thickness of 610 g/m2, or another method that provides an equivalent level of protection and abrasion resistance deemed acceptable by the CCMC.
- The installation of the auger-installed steel pile must be carried out as per the manufacturer’s instructions. The Pieux Vissés Vistech / Postech Screw Piles must be screwed into the ground to below the frost line using mechanized equipment. The anchor is rotated into the ground with sufficient applied downward pressure (crowd) to advance the anchor one pitch distance per revolution. The anchor is advanced until the applied torque value attains a specified value. Extensions are added to the central shaft as needed. The applied loads may be tensile (uplift) or compressive (bearing). Helical anchors are rapidly installed in a wide variety of soil formations using a variety of readily available equipment. They are immediately ready for loading after installation.
- The installer of the proposed auger-installed steel piles must be certified by Pieux Vistech – Postech Screw Piles Inc. Using approved equipment, the installer must follow the manufacturer’s installation instructions and the uses and limitations specified in this evaluation. Each installer must carry a certification card bearing their signature and photograph.
- Each Pieux Vissés Vistech / Postech Screw Pile must be identified with a label containing the following information:
- manufacturer’s identification; and
- the phrase “CCMC 13102-R.”
This evaluation is based on demonstrated conformance with the following criteria:
|Criteria number||Criteria name|
|CCMC-TG-316615.13-15B||CCMC Technical Guide for Augered-Installed Steel Piles|
The proposed auger-installed steel piles were tested to:
- ASTM D 1143/D 1143M-07(2013), “Standard Test Methods for Deep Foundations Under Static Axial Compressive Load,”
- ASTM D 3689/D 3689M-07(2013)e1, “Standard Test Methods for Deep Foundations Under Static Axial Tensile Load,” and
- ASTM D 3966/D 3966M-07(2013)e1, “Standard Test Methods for Deep Foundations Under Lateral Load.”
Testing was conducted on four different sites across Canada. Two sites had granular and clay soil; the other two had cohesive soil. A series of 32 tests was performed. The intent of the testing was to determine a correlation between the torque applied during installation and the allowable loads. In the granular and silt-based soils and in the cohesive soils, there was a good correlation between the torque applied during installation and the allowable loads. In the granular and silt-based soils, for the compressive loads noted in the Allowable compressive and tensile loads for the product in granular soil or silt, the factor of safety varied from 1.7 to 3.0. For the tensile loads, the factor of safety varied from 2.0 to 2.4. For the lateral loads, no correlation was possible.
|Applied torque||Allowable loads|
|1 017||750||24||5 400||8||1 800|
|1 356||1 000||29||6 525||11||2 475|
|1 695||1 250||34||7 650||14||3 150|
|2 034||1 500||39||8 775||18||4 050|
|2 373||1 750||44||9 900||21||4 725|
|2 712||2 000||49||11 025||25||5 625|
|3 051||2 250||53||11 925||31||6 975|
|3 390||2 500||58||13 050||31||6 975|
|3 728||2 750||63||14 175||35||7 875|
|4 068||3 000||68||15 300||40||9 000|
|4 407||3 250||73||16 425||44||9 900|
|4 746||3 500||78||17 550||48||10 800|
|5 085||3 750||82||18 450||50||11 250|
|5 424||4 000||87||19 575||52||11 700|
|5 763||4 250||92||20 700||54||12 150|
|6 102||4 500||97||21 825||56||12 600|
|6 441||4 750||-||-||58||13 050|
|6 780||5 000||-||-||60||13 500|
|Applied torque||Allowable loads|
|1 017||750||8||1 800||6||1 350|
|1 356||1 000||11||2 475||8||1 800|
|1 695||1 250||14||3 150||10||2 250|
|2 034||1 500||17||3 825||12||2 700|
|2 373||1 750||19||4 275||14||3 150|
|2 712||2 000||22||4 950||16||3 600|
|3 051||2 250||25||5 625||19||4 275|
|3 390||2 500||28||6 300||21||4 725|
|3 728||2 750||31||6 975||23||5 175|
|4 068||3 000||33||7 425||25||5 625|
|4 407||3 250||36||8 100||27||6 075|
|4 746||3 500||39||8 775||29||6 525|
|5 085||3 750||42||9 450||32||7 200|
|5 424||4 000||44||9 900||34||7 650|
|5 763||4 250||47||10 575||36||8 100|
|6 102||4 500||50||11 250||38||8 550|
Use of Canadian Construction Materials Centre (CCMC) assessments
This assessment must be read in the context of the entire CCMC Registry of Product Assessments, any applicable building code or by-law requirements, and/or any other regulatory requirements (for example, the Canada Consumer Product Safety Act, the Canadian Environmental Protection Act, etc.).
It is the responsibility of the user to confirm that the assessment they are using is current and has not been withdrawn or superseded by a later version on the CCMC Registry of Product Assessments.
The National Research Council of Canada (NRC) has evaluated only the characteristics of the specific product described herein. The information and opinions in this evaluation are directed to those who have the appropriate degree of experience to use and apply its contents (such as authorities having jurisdiction, design professionals and specifiers). This evaluation is valid when the product is used as part of permitted construction, respecting all conditions and limitations stated in the evaluation, and in accordance with applicable building codes and by-laws.
This evaluation is provided without representation, warranty or guarantee of any kind, expressed or implied, and the NRC provides no endorsement for any evaluated product. The NRC accepts no responsibility whatsoever arising in any way from any and all use of or reliance on the information contained herein or the use of any evaluated product. The NRC is not undertaking to render professional or other services on behalf of any person or entity nor to perform any duty owed by any person or entity to another person or entity.
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© His Majesty the King in Right of Canada, as represented by the National Research Council of Canada, 2023
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